From: Lina Iyer <ilina@codeaurora.org>
To: Marc Zyngier <maz@kernel.org>
Cc: swboyd@chromium.org, evgreen@chromium.org,
linus.walleij@linaro.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, bjorn.andersson@linaro.org,
mkshah@codeaurora.org, linux-gpio@vger.kernel.org,
rnayak@codeaurora.org
Subject: Re: [PATCH RFC 03/14] drivers: irqchip: add PDC irqdomain for wakeup capable GPIOs
Date: Fri, 30 Aug 2019 09:58:53 -0600 [thread overview]
Message-ID: <20190830155853.GA5224@codeaurora.org> (raw)
In-Reply-To: <d2a45d45-3071-ab8d-060b-92a2812a8d42@kernel.org>
On Fri, Aug 30 2019 at 08:50 -0600, Marc Zyngier wrote:
>[Please use my kernel.org address in the future. The days of this
>arm.com address are numbered...]
>
Sure, will update and repost.
>On 29/08/2019 19:11, Lina Iyer wrote:
>> Introduce a new domain for wakeup capable GPIOs. The domain can be
>> requested using the bus token DOMAIN_BUS_WAKEUP. In the following
>> patches, we will specify PDC as the wakeup-parent for the TLMM GPIO
>> irqchip. Requesting a wakeup GPIO will setup the GPIO and the
>> corresponding PDC interrupt as its parent.
>>
>> Co-developed-by: Stephen Boyd <swboyd@chromium.org>
>> Signed-off-by: Lina Iyer <ilina@codeaurora.org>
>> ---
>> drivers/irqchip/qcom-pdc.c | 104 ++++++++++++++++++++++++++++++++---
>> include/linux/soc/qcom/irq.h | 34 ++++++++++++
>> 2 files changed, 129 insertions(+), 9 deletions(-)
>> create mode 100644 include/linux/soc/qcom/irq.h
>>
>> diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
>> index 338fae604af5..ad1faf634bcf 100644
>> --- a/drivers/irqchip/qcom-pdc.c
>> +++ b/drivers/irqchip/qcom-pdc.c
>> @@ -13,12 +13,13 @@
>> #include <linux/of.h>
>> #include <linux/of_address.h>
>> #include <linux/of_device.h>
>> +#include <linux/soc/qcom/irq.h>
>> #include <linux/spinlock.h>
>> -#include <linux/platform_device.h>
>> #include <linux/slab.h>
>> #include <linux/types.h>
>>
>> #define PDC_MAX_IRQS 126
>> +#define PDC_MAX_GPIO_IRQS 256
>>
>> #define CLEAR_INTR(reg, intr) (reg & ~(1 << intr))
>> #define ENABLE_INTR(reg, intr) (reg | (1 << intr))
>> @@ -26,6 +27,8 @@
>> #define IRQ_ENABLE_BANK 0x10
>> #define IRQ_i_CFG 0x110
>>
>> +#define PDC_NO_PARENT_IRQ ~0UL
>> +
>> struct pdc_pin_region {
>> u32 pin_base;
>> u32 parent_base;
>> @@ -65,23 +68,35 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
>>
>> static void qcom_pdc_gic_disable(struct irq_data *d)
>> {
>> + if (d->hwirq == GPIO_NO_WAKE_IRQ)
>> + return;
>> +
>> pdc_enable_intr(d, false);
>> irq_chip_disable_parent(d);
>> }
>>
>> static void qcom_pdc_gic_enable(struct irq_data *d)
>> {
>> + if (d->hwirq == GPIO_NO_WAKE_IRQ)
>> + return;
>> +
>> pdc_enable_intr(d, true);
>> irq_chip_enable_parent(d);
>> }
>>
>> static void qcom_pdc_gic_mask(struct irq_data *d)
>> {
>> + if (d->hwirq == GPIO_NO_WAKE_IRQ)
>> + return;
>> +
>> irq_chip_mask_parent(d);
>> }
>>
>> static void qcom_pdc_gic_unmask(struct irq_data *d)
>> {
>> + if (d->hwirq == GPIO_NO_WAKE_IRQ)
>> + return;
>> +
>> irq_chip_unmask_parent(d);
>> }
>>
>> @@ -124,6 +139,9 @@ static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
>> int pin_out = d->hwirq;
>> enum pdc_irq_config_bits pdc_type;
>>
>> + if (pin_out == GPIO_NO_WAKE_IRQ)
>> + return 0;
>> +
>> switch (type) {
>> case IRQ_TYPE_EDGE_RISING:
>> pdc_type = PDC_EDGE_RISING;
>> @@ -181,8 +199,7 @@ static irq_hw_number_t get_parent_hwirq(int pin)
>> return (region->parent_base + pin - region->pin_base);
>> }
>>
>> - WARN_ON(1);
>> - return ~0UL;
>> + return PDC_NO_PARENT_IRQ;
>> }
>>
>> static int qcom_pdc_translate(struct irq_domain *d, struct irq_fwspec *fwspec,
>> @@ -211,17 +228,17 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq,
>>
>> ret = qcom_pdc_translate(domain, fwspec, &hwirq, &type);
>> if (ret)
>> - return -EINVAL;
>> -
>> - parent_hwirq = get_parent_hwirq(hwirq);
>> - if (parent_hwirq == ~0UL)
>> - return -EINVAL;
>> + return ret;
>>
>> ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
>> &qcom_pdc_gic_chip, NULL);
>> if (ret)
>> return ret;
>>
>> + parent_hwirq = get_parent_hwirq(hwirq);
>> + if (parent_hwirq == PDC_NO_PARENT_IRQ)
>> + return 0;
>> +
>> if (type & IRQ_TYPE_EDGE_BOTH)
>> type = IRQ_TYPE_EDGE_RISING;
>>
>> @@ -244,6 +261,60 @@ static const struct irq_domain_ops qcom_pdc_ops = {
>> .free = irq_domain_free_irqs_common,
>> };
>>
>> +static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq,
>> + unsigned int nr_irqs, void *data)
>> +{
>> + struct irq_fwspec *fwspec = data;
>> + struct irq_fwspec parent_fwspec;
>> + irq_hw_number_t hwirq, parent_hwirq;
>> + unsigned int type;
>> + int ret;
>> +
>> + ret = qcom_pdc_translate(domain, fwspec, &hwirq, &type);
>> + if (ret)
>> + return ret;
>> +
>> + ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
>> + &qcom_pdc_gic_chip, NULL);
>> + if (ret)
>> + return ret;
>> +
>> + if (hwirq == GPIO_NO_WAKE_IRQ)
>> + return 0;
>> +
>> + parent_hwirq = get_parent_hwirq(hwirq);
>> + if (parent_hwirq == PDC_NO_PARENT_IRQ)
>> + return 0;
>> +
>> + if (type & IRQ_TYPE_EDGE_BOTH)
>> + type = IRQ_TYPE_EDGE_RISING;
>> +
>> + if (type & IRQ_TYPE_LEVEL_MASK)
>> + type = IRQ_TYPE_LEVEL_HIGH;
>> +
>> + parent_fwspec.fwnode = domain->parent->fwnode;
>> + parent_fwspec.param_count = 3;
>> + parent_fwspec.param[0] = 0;
>> + parent_fwspec.param[1] = parent_hwirq;
>> + parent_fwspec.param[2] = type;
>> +
>> + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
>> + &parent_fwspec);
>> +}
>> +
>> +static int qcom_pdc_gpio_domain_select(struct irq_domain *d,
>> + struct irq_fwspec *fwspec,
>> + enum irq_domain_bus_token bus_token)
>> +{
>> + return (bus_token == DOMAIN_BUS_WAKEUP);
>> +}
>> +
>> +static const struct irq_domain_ops qcom_pdc_gpio_ops = {
>> + .select = qcom_pdc_gpio_domain_select,
>> + .alloc = qcom_pdc_gpio_alloc,
>> + .free = irq_domain_free_irqs_common,
>> +};
>> +
>> static int pdc_setup_pin_mapping(struct device_node *np)
>> {
>> int ret, n;
>> @@ -282,7 +353,7 @@ static int pdc_setup_pin_mapping(struct device_node *np)
>>
>> static int qcom_pdc_init(struct device_node *node, struct device_node *parent)
>> {
>> - struct irq_domain *parent_domain, *pdc_domain;
>> + struct irq_domain *parent_domain, *pdc_domain, *pdc_gpio_domain;
>> int ret;
>>
>> pdc_base = of_iomap(node, 0);
>> @@ -313,8 +384,23 @@ static int qcom_pdc_init(struct device_node *node, struct device_node *parent)
>> goto fail;
>> }
>>
>> + pdc_gpio_domain = irq_domain_create_hierarchy(parent_domain,
>> + IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP,
>> + PDC_MAX_GPIO_IRQS,
>> + of_fwnode_handle(node),
>> + &qcom_pdc_gpio_ops, NULL);
>> + if (!pdc_gpio_domain) {
>> + pr_err("%pOF: GIC domain add failed for GPIO domain\n", node);
>> + ret = -ENOMEM;
>> + goto remove;
>> + }
>> +
>> + irq_domain_update_bus_token(pdc_gpio_domain, DOMAIN_BUS_WAKEUP);
>> +
>> return 0;
>>
>> +remove:
>> + irq_domain_remove(pdc_domain);
>> fail:
>> kfree(pdc_region);
>> iounmap(pdc_base);
>> diff --git a/include/linux/soc/qcom/irq.h b/include/linux/soc/qcom/irq.h
>> new file mode 100644
>> index 000000000000..73239917dc38
>> --- /dev/null
>> +++ b/include/linux/soc/qcom/irq.h
>> @@ -0,0 +1,34 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +
>> +#ifndef __QCOM_IRQ_H
>> +#define __QCOM_IRQ_H
>> +
>> +#include <linux/irqdomain.h>
>> +
>> +#define GPIO_NO_WAKE_IRQ ~0U
>> +
>> +/**
>> + * QCOM specific IRQ domain flags that distinguishes the handling of wakeup
>> + * capable interrupts by different interrupt controllers.
>> + *
>> + * IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP: Line must be masked at TLMM and the
>> + * interrupt configuration is done at PDC
>> + * IRQ_DOMAIN_FLAG_QCOM_MPM_WAKEUP: Interrupt configuration is handled at TLMM
>> + */
>> +#define IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP (1 << 17)
>> +#define IRQ_DOMAIN_FLAG_QCOM_MPM_WAKEUP (1 << 18)
>
>Any reason why you're starting at bit 17? The available range in from
>bit 16... But overall, it would be better if you expressed it as:
>
>#define IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP (IRQ_DOMAIN_FLAG_NONCORE << 0)
>#define IRQ_DOMAIN_FLAG_QCOM_MPM_WAKEUP (IRQ_DOMAIN_FLAG_NONCORE << 1)
>
Okay.
>> +
>> +/**
>> + * irq_domain_qcom_handle_wakeup: Return if the domain handles interrupt
>> + * configuration
>> + * @parent: irq domain
>> + *
>> + * This QCOM specific irq domain call returns if the interrupt controller
>> + * requires the interrupt be masked at the child interrupt controller.
>> + */
>> +static inline bool irq_domain_qcom_handle_wakeup(struct irq_domain *parent)
>> +{
>> + return (parent->flags & IRQ_DOMAIN_FLAG_QCOM_PDC_WAKEUP);
>> +}
>> +
>> +#endif
>>
>
>But most of this file isn't used by this patch, so maybe it should be
>moved somewhere else...
>
Apart from creating the domain, this is not used here, but a separate
patch seemed excessive. Let me know if you have any suggestions.
Thanks,
Lina
next prev parent reply other threads:[~2019-08-30 15:59 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-29 18:11 [PATCH RFC 00/14] qcom: support wakeup capable GPIOs Lina Iyer
2019-08-29 18:11 ` [PATCH RFC 01/14] irqdomain: add bus token DOMAIN_BUS_WAKEUP Lina Iyer
2019-08-29 18:11 ` [PATCH RFC 02/14] drivers: irqchip: pdc: Do not toggle IRQ_ENABLE during mask/unmask Lina Iyer
2019-09-06 0:39 ` Stephen Boyd
2019-09-11 16:15 ` Lina Iyer
2019-09-20 22:22 ` Stephen Boyd
2019-09-20 22:31 ` Lina Iyer
2019-08-29 18:11 ` [PATCH RFC 03/14] drivers: irqchip: add PDC irqdomain for wakeup capable GPIOs Lina Iyer
2019-08-30 14:50 ` Marc Zyngier
2019-08-30 15:58 ` Lina Iyer [this message]
2019-09-02 8:21 ` Marc Zyngier
2019-09-03 22:51 ` Stephen Boyd
2019-08-29 18:11 ` [PATCH RFC 04/14] of: irq: document properties for wakeup interrupt parent Lina Iyer
2019-09-02 13:38 ` Rob Herring
2019-08-29 18:11 ` [PATCH RFC 05/14] dt-bindings/interrupt-controller: pdc: add SPI config register Lina Iyer
2019-09-02 13:38 ` Rob Herring
2019-09-02 13:53 ` Marc Zyngier
2019-09-03 17:07 ` Lina Iyer
2019-09-06 0:03 ` Stephen Boyd
2019-09-13 19:53 ` Lina Iyer
2019-09-17 21:50 ` Lina Iyer
2019-09-20 22:20 ` Stephen Boyd
2019-09-23 6:11 ` Sibi Sankar
[not found] ` <CACRpkdaReFzjb_hcDbQwqMX+whzscLpeZpJPHKqOo+9tANzemA@mail.gmail.com>
2019-09-11 15:19 ` Lina Iyer
2019-08-29 18:11 ` [PATCH RFC 06/14] drivers: irqchip: pdc: additionally set type in SPI config registers Lina Iyer
2019-09-06 0:22 ` Stephen Boyd
2019-08-29 18:11 ` [PATCH RFC 07/14] genirq: Introduce irq_chip_get/set_parent_state calls Lina Iyer
2019-09-06 0:35 ` Stephen Boyd
2019-08-29 18:11 ` [PATCH RFC 08/14] drivers: irqchip: pdc: Add irqchip set/get state calls Lina Iyer
2019-09-06 0:09 ` Stephen Boyd
2019-08-29 18:11 ` [PATCH RFC 09/14] drivers: pinctrl: msm: fix use of deprecated gpiolib APIs Lina Iyer
2019-09-06 0:11 ` Stephen Boyd
2019-09-11 10:19 ` Linus Walleij
2019-09-11 16:16 ` Lina Iyer
2019-08-29 18:11 ` [PATCH RFC 10/14] drivers: pinctrl: msm: setup GPIO chip in hierarchy Lina Iyer
2019-08-29 18:12 ` [PATCH RFC 11/14] drivers: pinctrl: sdm845: add PDC wakeup interrupt map for GPIOs Lina Iyer
2019-09-06 0:24 ` Stephen Boyd
2019-08-29 18:12 ` [PATCH RFC 12/14] arm64: dts: qcom: add PDC interrupt controller for SDM845 Lina Iyer
2019-09-09 11:26 ` Maulik Shah
2019-08-29 18:12 ` [PATCH RFC 13/14] arm64: dts: qcom: setup PDC as the wakeup parent for TLMM on SDM845 Lina Iyer
2019-08-29 18:12 ` [PATCH RFC 14/14] arm64: defconfig: enable PDC interrupt controller for Qualcomm SDM845 Lina Iyer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190830155853.GA5224@codeaurora.org \
--to=ilina@codeaurora.org \
--cc=bjorn.andersson@linaro.org \
--cc=evgreen@chromium.org \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maz@kernel.org \
--cc=mkshah@codeaurora.org \
--cc=rnayak@codeaurora.org \
--cc=swboyd@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).